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From "Sumod Pawgi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8890) Enhance cassandra-env.sh to handle Java version output in case of OpenJDK icedtea"
Date Wed, 11 Mar 2015 16:22:38 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14357121#comment-14357121
] 

Sumod Pawgi commented on CASSANDRA-8890:
----------------------------------------

OK. I followed  the instructions in the link. Let me check what I missed and correct it. Thanks.

> Enhance cassandra-env.sh to handle Java version output in case of OpenJDK icedtea"
> ----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8890
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8890
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Config
>         Environment: Red Hat Enterprise Linux Server release 6.4 (Santiago)
>            Reporter: Sumod Pawgi
>            Priority: Minor
>              Labels: conf, icedtea
>             Fix For: 3.0
>
>         Attachments: trunk-8890.txt
>
>
> Where observed - 
> Cassandra node has OpenJDK - 
> java version "1.7.0_09-icedtea"
> In some situations, external agents trying to monitor a C* cluster would need to run
cassandra -v command to determine the Cassandra version and would expect a numerical output
e.g. java version "1.7.0_75" as in case of Oracle JDK. But if the cluster has OpenJDK IcedTea
installed, then this condition is not satisfied and the agents will not work correctly as
the output from "cassandra -v" is 
> /opt/apache/cassandra/bin/../conf/cassandra-env.sh: line 102: [: 09-icedtea: integer
expression expected
> Cause - 
> The line which is causing this behavior is -
> jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print
$2}'`
> Suggested enhancement -
> If we change the line to -
>  jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print
$2}' | awk 'BEGIN {FS="-"};{print $1}'`,
> it will give $jvmver as - 1.7.0_09 for the above case. 
> Can we add this enhancement in the cassandra-env.sh? I would like to add it myself and
submit for review, but I am not familiar with C* check in process. There might be better ways
to do this, but I thought of this to be simplest and as the edition is at the end of the line,
it will be easy to reverse if needed.



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